Patents by Inventor Donald B. Johnson

Donald B. Johnson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10765832
    Abstract: The invention primarily is directed to a medical tubing adapted for insertion into a body tissue or cavity and method of manufacturing different variations of the tubing along a length of the tubing. The tubing comprises a plurality of individual, discrete, generally ring-shaped elements arranged in series and fused or bonded together forming a continuous tubular structure. The ring-shaped elements may include a combination of flexible and rigid ring-shaped elements assembled along different portions or sections of the tubular structure. In another aspect of the invention, the medical tubing may further comprise a secondary lumen and a pull wire to control the tubular structure. In another aspect of the invention, the ring-shaped elements may vary in diameter and/or composition in different portions or sections of the tubular structure.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: September 8, 2020
    Assignee: Applied Medical Resources Corporation
    Inventors: John R. Brustad, Said S. Hilal, Nabil Hilal, Charles C. Hart, Gary M. Johnson, Serene Wachli, Ghassan Sakakine, Donald L. Gadberry, Edward D. Pingleton, Matthew N. Petrime, Payam Adlparvar, Carl B. Hadley, Kenneth K. Vu
  • Patent number: 8983064
    Abstract: A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private key selected by one of the correspondents. The method comprises first obtaining the public key. The public key is then subjected to at least one mathematical test to determine whether the public key satisfies predefined mathematical characteristics. Messages utilizing the public key are accepted if the public key satisfies the predefined mathematical characteristics.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: March 17, 2015
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Alfred John Menezes, Minghua Qu, Donald B. Johnson
  • Patent number: 8953787
    Abstract: A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private key selected by one of the correspondents. The method comprises first obtaining the public key. The public key is then subjected to at least one mathematical test to determine whether the public key satisfies predefined mathematical characteristics. Messages utilizing the public key are accepted if the public key satisfies the predefined mathematical characteristics.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: February 10, 2015
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Alfred John Menezes, Minghua Qu, Donald B. Johnson
  • Publication number: 20140344576
    Abstract: A system and method for validating digital information transmitted by one correspondent to another in a data communication system. The method comprising the steps of generating a public key in accordance with a predetermined, generating a public key in accordance with a predetermined cryptographic scheme having predetermined arithmetic properties and system parameters. The verifying said public key conforms to said arithmetic properties of said scheme, transmitting said verified public key to a recipient.
    Type: Application
    Filed: November 25, 2013
    Publication date: November 20, 2014
    Applicant: Certicom Corp.
    Inventor: Donald B. JOHNSON
  • Publication number: 20140281538
    Abstract: A public key encryption system exchanges information between a pair of correspondents. The recipient performs computations on the received data to recover the transmitted data or verify the identity of the sender. The data transferred includes supplementary information that relates to intermediate steps in the computations performed by the recipient.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 18, 2014
    Applicant: CERTICOM CORP.
    Inventors: Scott A. VANSTONE, Donald B. JOHNSON
  • Patent number: 8738912
    Abstract: A public key encryption system exchanges information between a pair of correspondents. The recipient performs computations on the received data to recover the transmitted data or verify the identity of the sender. The data transferred includes supplementary information that relates to intermediate steps in the computations performed by the recipient.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: May 27, 2014
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Donald B. Johnson
  • Patent number: 8732467
    Abstract: A method for creating and authenticating a digital signature is provided, including selecting a first session parameter k and generating a first short term public key derived from the session parameter k, computing a first signature component r derived from a first mathematical function using the short term public key, selecting a second session parameter t and computing a second signature component s derived from a second mathematical function using the second session parameter t and without using an inverse operation, computing a third signature component using the first and second session parameters and sending the signature components (s, r, c) as a masked digital signature to a receiver computer system. In the receiver computer system, a recovered second signature component s? is computed by combining a third signature component with the second signature component to derive signature components (s?, r) as an unmasked digital signature.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: May 20, 2014
    Assignee: Certicom Corp.
    Inventors: Scott Alexander Vanstone, Donald B. Johnson, Minghua Qu
  • Patent number: 8688998
    Abstract: A system and method are provided for enabling a symmetric key to be derived, the method comprising: obtaining a plurality of key parts, wherein the plurality of key parts when combined equal the symmetric key; encrypting a first of the key parts using a first cryptographic algorithm to generate a first encrypted value; encrypting one or more remaining key parts of the plurality of key parts using respective cryptographic algorithms to generate one or more additional encrypted values, wherein each key part encrypted is encrypted using a different cryptographic algorithm; and providing the first encrypted value and the one or more additional encrypted values to an other entity to enable the other entity to derive the symmetric key.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: April 1, 2014
    Assignee: Certicom Corp.
    Inventors: Donald B. Johnson, Scott A. Vanstone
  • Patent number: 8594324
    Abstract: A method performed at a computing device for validation of a public key, the public key for use in a communication system. The method includes obtaining the public key, and verifying, by the computing device, that the obtained public key is a point on an elliptic curve defined over a finite field, the verifying including substituting the obtained public key into an equation defining the elliptic curve, the elliptic curve being associated with the communication system.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: November 26, 2013
    Assignee: Certicom Corp.
    Inventor: Donald B. Johnson
  • Patent number: 8359468
    Abstract: The present invention relates to digital signature operations using public key schemes in a secure communications system and in particular for use with processors having limited computing power such as ‘smart cards’. This invention describes a method for creating and authenticating a digital signature comprising the steps of selecting a first session parameter k and generating a first short term public key derived from the session parameter k, computing a first signature component r derived from a first mathematical function using the short term public key, selecting a second session parameter t and computing a second signature component s derived from a second mathematical function using the second session parameter t and without using an inverse operation, computing a third signature component using the first and second session parameters and sending the signature components (s, r, c) as a masked digital signature to a receiver computer system.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: January 22, 2013
    Assignee: Certicom Corp.
    Inventors: Scott Alexander Vanstone, Donald B. Johnson, Minghua Qu
  • Publication number: 20130019099
    Abstract: A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private key selected by one of the correspondents. The method comprises first obtaining the public key. The public key is then subjected to at least one mathematical test to determine whether the public key satisfies predefined mathematical characteristics. Messages utilizing the public key are accepted if the public key satisfies the predefined mathematical characteristics.
    Type: Application
    Filed: September 15, 2012
    Publication date: January 17, 2013
    Inventors: Scott A. Vanstone, Alfred John Menezes, Minghua Qu, Donald B. Johnson
  • Publication number: 20120290836
    Abstract: A public key encryption system exchanges information between a pair of correspondents. The recipient performs computations on the received data to recover the transmitted data or verify the identity of the sender. The data transferred includes supplementary information that relates to intermediate steps in the computations performed by the recipient.
    Type: Application
    Filed: July 25, 2012
    Publication date: November 15, 2012
    Applicant: CERTICOM CORP.
    Inventors: Scott A. VANSTONE, Donald B. JOHNSON
  • Patent number: 8312283
    Abstract: A public key encryption system exchanges information between a pair of correspondents. The recipient performs computations on the received data to recover the transmitted data or verify the identity of the sender. The data transferred includes supplementary information that relates to intermediate steps in the computations performed by the recipient.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: November 13, 2012
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Donald B. Johnson
  • Publication number: 20120281826
    Abstract: A system and method are provided for enabling a symmetric key to be derived, the method comprising: obtaining a plurality of key parts, wherein the plurality of key parts when combined equal the symmetric key; encrypting a first of the key parts using a first cryptographic algorithm to generate a first encrypted value; encrypting one or more remaining key parts of the plurality of key parts using respective cryptographic algorithms to generate one or more additional encrypted values, wherein each key part encrypted is encrypted using a different cryptographic algorithm; and providing the first encrypted value and the one or more additional encrypted values to an other entity to enable the other entity to derive the symmetric key.
    Type: Application
    Filed: July 18, 2012
    Publication date: November 8, 2012
    Applicant: CERTICOM CORP.
    Inventors: Donald B. JOHNSON, Scott A. VANSTONE
  • Publication number: 20120257758
    Abstract: A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private key selected by one of the correspondents. The method comprises first obtaining the public key. The public key is then subjected to at least one mathematical test to determine whether the public key satisfies predefined mathematical characteristics. Messages utilizing the public key are accepted if the public key satisfies the predefined mathematical characteristics.
    Type: Application
    Filed: June 20, 2012
    Publication date: October 11, 2012
    Inventors: Scott A. VANSTONE, Alfred John MENEZES, Minghua QU, Donald B. JOHNSON
  • Patent number: 8233617
    Abstract: A system and method are provided for enabling a symmetric key to be derived, the method comprising: obtaining a plurality of key parts, wherein the plurality of key parts when combined equal the symmetric key; encrypting a first of the key parts using a first cryptographic algorithm to generate a first encrypted value; encrypting one or more remaining key parts of the plurality of key parts using respective cryptographic algorithms to generate one or more additional encrypted values, wherein each key part encrypted is encrypted using a different cryptographic algorithm; and providing the first encrypted value and the one or more additional encrypted values to an other entity to enable the other entity to derive the symmetric key.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: July 31, 2012
    Assignee: Certicom Corp.
    Inventors: Donald B. Johnson, Scott Alexander Vanstone
  • Patent number: 8229113
    Abstract: A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private key selected by one of the correspondents. The method comprises first obtaining the public key. The public key is then subjected to at least one mathematical test to determine whether the public key satisfies predefined mathematical characteristics. Messages utilizing the public key are accepted if the public key satisfies the predefined mathematical characteristics.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: July 24, 2012
    Assignee: Certicom Corp.
    Inventors: Scott A. Vanstone, Alfred John Menezes, Minghua Qu, Donald B. Johnson
  • Patent number: 8116451
    Abstract: A system and method for validating digital information transmitted by one correspondent to another in a data communication system. The method comprising the steps of generating a public key in accordance with a predetermined, generating a public key in accordance with a predetermined cryptographic scheme having predetermined arithmetic properties and system parameters. The verifying said public key conforms to said arithmetic properties of said scheme, transmitting said verified public key to a recipient.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: February 14, 2012
    Assignee: Certicom Corporation
    Inventor: Donald B. Johnson
  • Publication number: 20120014523
    Abstract: A system and method for validating digital information transmitted by one correspondent to another in a data communication system. The method comprising the steps of generating a public key in accordance with a predetermined, generating a public key in accordance with a predetermined cryptographic scheme having predetermined arithmetic properties and system parameters. The verifying said public key conforms to said arithmetic properties of said scheme, transmitting said verified public key to a recipient.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventor: Donald B. Johnson
  • Patent number: RE44670
    Abstract: A method for communicating information between at least a pair of correspondents, the method comprising the steps of each of the correspondents selecting a plurality of cryptographic algorithms known to each of the correspondents. One of the correspondents applies the algorithms in a predetermined manner to a message for producing a set of processed information. The set of processed information is transmitted to the other correspondent. The other correspondent applies complimentary operations of the cryptographic schemes in accordance with the predetermined manner for deriving information related to the message from the processed information.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: December 24, 2013
    Assignee: Certicom Corp.
    Inventors: Donald B. Johnson, Scott A. Vanstone